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2015-04-14 댓글 없음 자주 묻는 질문

Buttweld Fittings

A pipe fitting is defined as a part used in a piping system, for changing direction, branching or for change of pipe diameter, and which is mechanically joined to the system. There are many different types of fittings and they are the same in all sizes and schedules as the pipe.

Fittings are divided into three groups:

  • Buttweld (BW) fittings whose dimensions, dimensional tolerances et cetera are defined in the ASME B16.9 standards. Light-weight corrosion resistant fittings are made to MSS SP43.
  • Socket Weld (SW) fittings Class 3000, 6000, 9000 are defined in the ASME B16.11 standards.
  • Threaded (THD), screwed fittings Class 2000, 3000, 6000 are defined in the ASME B16.11 standards.

Standard Buttweld Fittings

bw elbow lr - What are details of butt weld fittings?

Elbow 90deg. LR

 

bw elbow 45 - What are details of butt weld fittings?

Elbow 45deg. LR

 

bw elbow sr - What are details of butt weld fittings?

Elbow 90deg. SR

 

bw elbow 180 - What are details of butt weld fittings?

Elbow 180deg. LR

 

bw elbow 180 sr - What are details of butt weld fittings?

Elbow 180deg. SR

 

bw tee eq - What are details of butt weld fittings?

Tee EQ

 

bw tee red - What are details of butt weld fittings?

Tee Reducing

 

bw con red - What are details of butt weld fittings?

Reducer Concentric

 

bw red ecc - What are details of butt weld fittings?

Reducer Eccentric

 

bw cap - What are details of butt weld fittings?

End Cap

 

bw stubend asme - What are details of butt weld fittings?

Stub End ASME B16.9

 

bw stubend mss - What are details of butt weld fittings?

Stub End MSS SP43

Applications of Buttweld Fittings

A piping system using buttweld fittings has many inherent advantages over other forms.

  • Welding a fitting to the pipe means it is permanently leakproof
  • The continuous metal structure formed between pipe and fitting adds strength to the system
  • Smooth inner surface and gradual directional changes reduce pressure losses and turbulence and minimize the action of corrosion and erosion
  • A welded system utilizes a minimum of space

Bevelled Ends

The ends of all buttweld fittings are bevelled, exceeding wall thickness 4 mm for austenitic stainless steel, or 5 mm for ferritic stainless steel. The shape of the bevel depending upon the actual wall thickness. This bevelled ends are needed to be able to make a “Butt weld”.

bw bevels - What are details of butt weld fittings?

ASME B16.25 covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements for welding bevels, for external and internal shaping of heavy-wall components, and for preparation of internal ends (including dimensions and dimensional tolerances). These weld edge preparation requirements are also incorporated into the ASME standards (e.g., B16.9, B16.5, B16.34).

Material and Performance

The most common materials used in fittings produced is carbon steel, stainless steel, cast iron, aluminium, copper, glass, rubber, the various types of plastics, etc..

In addition, fittings, like pipes, for specific purposes sometimes internally equipped with layers of materials of a completely different quality as the fitting themselves, which are “lined fittings”.

The material of a fitting is basically set during the choice of the pipe, in most cases, a fitting is of the same material as the pipe.

Carbon steel buttweld fittings are common for pipelines and process piping in the oil and gas and power generation industry, stainless steel fittings are for higher temperature, pressure and corrosion applications (desalination, pharmaceutical and, food sectors).

Let’s dive into the three main groups of materials for buttweld fittings, ASTM A234 (carbon/alloy pipe fittings), ASTM A403 (stainless steel), and ASTM A815 (duplex and super duplex BW pipe fittings).

Important to note that the material of the pipe and the buttweld fitting shall match (for example, an ASTM A106 Gr. B pipe shall be connected to an ASTM A234 WPB BW fitting, or an ASTM A312 T304 pipe has to be welded to an ASTM A403 WP304 fitting and so on). It is not possible to use pipes and buttweld fittings of different materials. Likewise, the size of the buttweld fitting and the size of the connected pipe shall match.

CARBON/ALLOY STEEL BUTTWELD FITTINGS (ASTM A234)

The ASTM A234 specification covers carbon steel and alloy steel pipe fittings (butt weld) for high-temperature service.

A234 WPA, WPC and, WPC fittings match ASTM A53, ASTM A106 and, API 5L Gr. B pipes. A234 WP1 to WP91 butt weld fittings match ASTM A335 chrome-moly pipes.

The ASTM A420 specification covers low-temperature carbon steel butt weld fittings to match ASTM A333 Gr.3 and ASTM A333 Gr. 6 pipes; the ASTM A860 specification (WPHY42, WPHY52, WPHY56, WPHY60) covers high yield wrought carbon steel fittings that match high yield API 5L Gr. X42, X52, X56, X60 pipes.

ASTM A234 Chemical Composition

Chemical composition of ASTM A234 Carbon and Alloy Steel Fittings
등급 C Mn 최대 P S 최대 Si Cr Mo Ni Cu Others
WPB
(1,2,3,4,5) 		0.30
max 		0.29-1.06 0.050 0.058 0.10
min 		0.40
max 		0.15
max 		0.40
max 		0.40
max 		V 0.08
max
WPC
(2,3,4,5) 		0.35
max 		0.29-1.06 0.050 0.058 0.10
min 		0.40
max 		0.15
max 		0.40
max 		0.40
max 		V 0.08
max
WP1 0.28
max 		0.30-0.90 0.045 0.045 0.10-0.50 0.44-0.65
WP12 CL1 0.05-
0.20 		0.30-0.80 0.045 0.045 0.60
max 		0.80-1.25 0.44-0.65
WP12 CL2 0.05-
0.20 		0.30-0.80 0.045 0.045 0.60
max 		0.80-1.25 0.44-0.65
WP11 CL1 0.05-
0.15 		0.30-0.60 0.030 0.030 0.50-1.00 1.00-1.50 0.44-0.65
WP11 CL2 0.05-
0.20 		0.30-0.80 0.040 0.040 0.50-1.00 1.00-1.50 0.44-0.65
WP11 CL3 0.05-
0.20 		0.30-0.80 0.040 0.040 0.50-1.00 1.00-1.50 0.44-0.65
WP22 CL1 0.05-
0.15 		0.30-0.60 0.040 0.040 0.50
max 		1.90-2.60 0.87-1.13
WP22 CL3 0.05-
0.15 		0.30-0.60 0.040 0.040 0.50
max 		1.90-2.60 0.87-1.13
WP5 CL1 0.15
max 		0.30-0.60 0.040 0.030 0.50
max 		4.0-6.0 0.44-0.65
WP5 CL3 0.15
max 		0.30-0.60 0.040 0.030 0.50
max 		4.0-6.0 0.44-0.65
WP9 CL1 0.15
max 		0.30-0.60 0.030 0.030 1.00
max 		8.0-10.0 0.90-1.10
WP9 CL3 0.15
max 		0.30-0.60 0.030 0.030 1.00
max 		8.0-10.0 0.90-1.10
WPR 0.20
max 		0.40-1.06 0.045 0.050 1.60-
2.24 		0.75-1.25
WP91 0.08-
0.12 		0.30-0.60 0.020 0.010 0.20-0.50 8.0-9.5 0.85-1.05 0.40
max 		V 0.18- 0.25
Nb 0.06-0.10
N 0.03-0.07
Al 0.02 max(6)
Ti 0.01 max(6)
Zr 0.01 max(6)
WP911 0.09-
0.13 		0.30-0.60 0.020 0.010 0.10-0.50 8.0-9.5 0.90-1.10 0.40
max 		V 0.18-0.25
Nb 0.060-0.10
N 0.04-0.09
Al 0.02 max(6)
B 0.0003-0.006
W 0.90-1.10
Ti 0.01 max(6)
Zr 0.01 max(6)

Notes:

  1. Fittings from bar or plate 0.35 max carbon.
  2. Fittings from forgings 0.35 max Carbon and 0.35 max Silicon with no minimum.
  3. For each reduction of 0.01% below the specified Carbon maximum, an increase of 0.06% Manganese above the specified maximum is permitted, up to a maximum of 1.35%.
  4. The sum of Cu, Ni, Niobium, and Moly shall not exceed 1.00%.
  5. The sum of Niobium and Moly shall not exceed 0.32%.
  6. Applies to heat and product analyses

ASTM A234 Mechanical Properties

Tensile and Yield Strength ASTM A234 for Carbon and Alloy Steel Fittings WPB WPC,
WP11-CL2 		WP11-CL1,
WP22-CL1
WP5-CL1
WP9-CL1 		WP11-CL3,
WP22-CL3
WP5-CL3
WP9-CL3 		WP91
Tensile strength, minimum unless a range is given ksi (MPa) 60 (415) 70 (485) 60 (415) 75 (520) 90 (620)
Yield strength, min ksi (MPa) (0.2% offset or 0.5% extension under-load) 35 (240) 40 (275) 30 (205) 45 (310) 60 (415)

 

Elongation ASTM A234 for Carbon and Alloy Steel Fittings WPB,
WPC, WP11, WP22 		WP91
  Longitud. Transverse Longitud. Transverse
표준
round specimen, or small proportional specimen, min % in 4 D 		22 14 20 13
Rectangular specimen for wall thickness 5/16″ and over, and
for all small sizes tested in full section; min % in 2 in. 		30 20
Rectangular specimen for wall thickness less than 5/16″;
min % in 2 in (1/2″ wide specimen) 		see note

Note:  For each 0.79 mm decrease in wall thickness below 7.94 mm, a deduction of 1.5 % for longitudinal and 1.0 % for transverse from standard values are permitted.

Source: Projectmaterials.com

STAINLESS STEEL BUTTWELD FITTINGS (ASTM A403)

The ASTM A403 specification covers austenitic stainless steel butt weld fittings to match ASTM A312 TP304, TP316, TP321, etc., pipes.

SS fittings - What are details of butt weld fittings?

ASTM A403 Chemical Composition

Chemical Composition of ASTM A403 Stainless Steel
등급 UNS
nbsp; 		C
strong>(1) 		Mn
strong>(1) 		P
strong>(1) 		S
strong>(1) 		Si
strong>(1) 		Ni Cr Mo Ti N
strong>(2) 		Others
WPXM-19 S20910 0.06 4.0-6.0 0.045 0.030 1.0 11.5-13.5 20.5-23.5 1.50-3.0 0.20-0.40 (3)
WP304 S3040 0.08 2.0 0.045 0.030 1.0 8.0-11.0 18.0-20.0
WP304L S30403 0.030
(4) 		2.0 0.045 0.030 1.0 8.0-12.0 18.0-20.0
WP304H S30409 0.04-0.10 2.0 0.045 0.030 1.0 8.0-11.0 18.0-20.0
WP304N S30451 0.08 2.0 0.045 0.030 1.0 8.0-11.0 18.0-20.0 0.10-0.16
WP304LN S30453 0.030 2.0 0.045 0.030 1.0 8.0-11.0 18.0-20.0 0.10-0.16
WP309 S3090 0.20 2.0 0.045 0.030 1.0 12.0-15.0 22.0-24.0
WP310S S3108 0.08 2.0 0.045 0.030 1.0 19.0-22.0 24.0-26.0
WPS31254 S31254 0.020 1.0 0.030 0.010 0.80 17.5-18.5 19.5-20.5 6.0-6.5 0.18-0.22 Cu0.50-1.0
WP316 S3160 0.08 2.0 0.045 0.030 1.0 10.0-14.0 16.0-18.0 2.0-3.0
WP316L S31603 0.030 align=”center”(4) 2.0 0.045 0.030 1.0 10.0-14.0
(5) 		16.0-18.0 2.0-3.0
WP316H S31609 0.04-0.10 2.0 0.045 0.030 1.0 10.0-14.0 16.0-18.0 2.0-3.0 0.10-0.16
WP316N S31651 0.08 2.0 0.045 0.030 1.0 10.0-13.0 16.0-18.0 2.0-3.0 0.10-0.16
WP316LN S31653 0.030 2.0 0.045 0.030 1.0 10.0-13.0 16.0-18.0 2.0-3.0 0.10-0.16
WP317 S3170 0.08 2.0 0.045 0.030 1.0 11.0-15.0 18.0-20.0 3.0-4.0
WP317L S31703 0.030 2.0 0.045 0.030 1.0 11.0-15.0 18.0-20.0 3.0-4.0
WPS31725 S31725 0.030 2.0 0.045 0.030 1.0 13.5-17.5 18.0-20.0 4.0-5.0 0.20
WPS31726 S31726 0.030 2.0 0.045 0.030 1.0 13.5-17.5 17.0-20.0 4.0-5.0 0.10-0.20
WPS31727 S31727 0.030 1.0 0.030 0.030 1.0 14.5-16.5 17.5-19.0 3.8-4.5 0.15-0.21 Cu2.8-4.0
WPS32053 S32053 0.030 1.0 0.030 0.010 1.0 24.0-26.0 22.0-24.0 5.0-6.0 0.17-0.22
WP321 S3210 0.08 2.0 0.045 0.030 1.0 9.0-12.0 17.0-19.0 (6)
WP321H S32109 0.04-0.10 2.0 0.045 0.030 1.0 9.0-12.0 17.0-19.0 (7)
WPS33228 S33228 0.04-0.08 1.0 0.020 0.015 0.30 31.0-33.0 26.0-28.0 Ce 0.05-0.10 Al 0.025Nb 0.6-0.10
WPS34565 S34565 0.030 5.0-
7.0 		0.030 0.010 1.0 16.0-18.0 23.0-25.0 4.0-5.0 0.40-0.60 Nb 0.10
WP347 S3470 0.08 2.0 0.045 0.030 1.0 9.0-12.0 17.0-19.0 (8)
WP347H S34709 0.04-0.10 2.0 0.045 0.030 1.0 9.0-12.0 17.0-19.0 (9)
WP348 S3480 0.08 2.0 0.045 0.030 1.0 9.0-12.0 17.0-19.0 Nb+Ta= 103(C)-1.10Ta 0.10Co 0.20
WP348H S34809 0.04-0.10 2.0 0.045 0.030 1.0 9.0-12.0 17.0-19.0 Nb+Ta= 83(C)-1.10Ta 0.10Co 0.20
WPS38815 S38815 0.030 2.0 0.040 0.020 5.5-
6.5 		13.0-17.0 13.0-15.0 0.75-1.50 Cu 0.75-1.50Al 0.30

Notes:

  1. Maximum, if not otherwise indicated.
  2. The method of analysis for Nitrogen is agreed between the purchaser and manufacturer.
  3. Niobium 0.10-0.30%; Vanadium, 0.10-0.30%.
  4. For small diameter or thin walls, a Carbon maximum of 0.040% is mandatory in grades TP304L and TP316L. Small outside diameter tubes are those less than 0.50 in. [12.7 mm] 5) in outside diameter and light wall tubes as those less than 0.049 in. [1.24 mm] in average wall thickness.
  5. On pierced tubing, the Nickel may be 11.0-16.0%.
  6. 5 X (C+N2)-0.70.
  7. 4 X (C+N2) -0.70.
  8. The Niobium % shall be ten times above the Carbon content and not more than 1.10%.
  9. The Niobium % shall be eight times above the Carbon content and not more than 1.10%.

ASTM A403 Mechanical Properties

Tensile and Elongation Requirements ASTM A403 WP304, WP316 WP304L, WP316L
Yield Strength, min, ksi [MPa] 30 [205] 25 [170]
Tensile Strength, min, ksi [MPa] 75 [515] 70 [485]
Elongation Longitudinal 28 28
Transverse 20 20

DUPLEX/ SUPER DUPLEX BUTTWELD FITTINGS (ASTM A815)

The ASTM A815 specification covers duplex and super duplex butt weld fittings to match ASTM A790 and ASTM A928 pipes. These special grades of stainless steel are used for various chemical processes,  piping, oilfield piping and heat exchangers, flue gas desulfurization processes.

Duplex steel fittings - What are details of butt weld fittings?

Duplex stainless steel has the following advantages over Series 300 standard SS: 

  • Good general corrosion resistance and high strength
  • Higher resistance to chloride stress corrosion cracking
  • Resistance to chloride pitting and crevice corrosion
  • Good sulfide stress corrosion resistance
  • Easy to weld and conform

UNS S31803, UNS S32205 Chemical Composition (Duplex)

등급 C Mn Si P S Cr Mo Ni N Fe
S31803 0.030 max 2.00 max 1.00 max 0.030 max 0.020 max 22.0 – 23.0 3.0 – 3.5 4.50 – 6.50 0.14 – 0.20 63.72 min
S32205 0.030 max 2.00 max 1.00 max 0.030 max 0.020 max 21.0 – 23.0 2.50 – 3.50 4.50 – 6.50 0.8 – 0.20 63.54 min

UNS S31803, UNS S32205 Mechanical Properties (Duplex)

성적 Density (g/cm 3) Density (lb/in 3) Melting Point (°C) Melting Point (°F)
S31803 / S32205 7.805 0.285 1420 – 1465 2588 – 2669

UNS S32750, UNS S32760 Chemical Composition (Super Duplex)

등급 C Mn Si P S Cr Mo Ni N Fe
S 32750 0.030 max 1.20 max 0.80 max 0.035 max 0.020 max 24.00 – 26.00 3.00 – 5.00 6.00 – 8.00 0.24 – 0.32 58.095 min
S 32760 0.05 max 1.00 max 1.00 max 0.030 max 0.010 max 24.00 – 26.00 3.00 – 4.00 6.00 – 8.00 0.20 – 0.30 57.61 min

UNS S32750, UNS S32760 Mechanical Properties (Super Duplex)

성적 Density (g/cm 3) Density (lb/in 3) Melting Point (°C) Melting Point (°F)
S32750 / S32760 7.8 0.281 1350 2460

NICKEL ALLOY BUTTWELD FITTINGS (ASTM B366)

Nickel alloy buttweld fittings are used for higher pressure/temperature and corrosive media, where lower grades would fail. The ASTM B366/SB 366 specification covers these high-alloy grades buttweld fittings (super-alloys) as Inconel, Incoloy, Hastelloy and the others listed in the table below. The MSS-SP 43 specification, instead, covers the dimensions and the tolerances of nickel alloy buttweld fittings.

Nickel-Alloy Buttweld Fittings Grades

Name UNS DIN Matching Pipe Grade Equivalent Forged Grade
904L N08904 1.4539 B677/B673 B649
Alloy 020 N08020 2.466 B729/B464 B462
Alloy 230 N06230 – B622/B619 B564
Alloy 400 (Monel) N04400 2.436 B165/B725 B564
Alloy 59 N06059 2.4605 B622/B619 B564
Alloy 600 (Inconel) N06600 2.4816 B167/B517 B564
Alloy 625 (Inconel) N06625 2.4856 B444/B705 B564
Alloy 800 (Incoloy) N08800 1.4558 B407/B514 B564
Alloy 800H (Incoloy) N08810 1.4958 B407/B514 B564
Alloy 800HT (Incoloy) N08811 1.4959 B407 B564
Alloy 825 (Incoloy) N08825 2.4858 B423/B705 B564
Alloy B N10001 – B622/B619 –
Alloy B2 (Hastelloy) N10665 2.4617 B622/B619 –
Alloy B3 (Hastelloy) N10675 – B622/B619 B564
Alloy C22 (Hastelloy) N06022 2.4602 B622/B619 B564
Alloy C276 (Hastelloy) N10276 2.4819 B622/B619 B564
Alloy C4 N06455 2.461 B622/B619 –
Alloy G-3 N06985 2.4619 B622/B619 –
Alloy G30 N06030 – B622/B619 –
Alloy K500 (Monel) N05500 2.4375 – B865
Nickel 200 N02200 2.4066 B161/B725 B564
Nickel 201 N02201 2.4068 B161/B725 –

Nickel-Alloy Buttweld Fittings Chemical Composition

Fe C Ni Cr Mo Co Cu Mn S Si W V P Al Ti
Nickel 200 .40 max .15 max 99.0 min .25 max .35 max .01 max .35 max
Nickel 201 .40 max .02 max 99.0 min .25 max .35 max .01 max .35 max
Hastelloy C276 4.0-7.0 .01 max Remainder 14.5-16.5 15.0-17.0 2.5 max 1.0 max .03 max .08 max 3.0-4.5 .35 max .04 max
Inconel 600 6.0-10.0 .15 max 72.0 min* 14.0-17.0 .50 max 1.00 max .015 max .50 max
Inconel 601 14 0.05 61.5 22.5 0.3 0.2 1.4
Inconel 625 5.0 max .10 max Remainder 20.00-30.00 8.0-10.0 1.0 max** .50 max .015 max .50 max .015 max .40 max .40 max
Inconel 718 Remainder .08 max 50.00-55.00 17.00-21.00 2.80-3.30 1.00 max .30 max .35 max .015 max .35 max .015 max .20-.80 .65-1.15
Incoloy 800 39.5 min .10 max 30.0-35.0 19.0-23.0 .15-.60 .15-.60
Incoloy 800H 39.5 min .05-.10 30.0-35.0 19.0-23.0 .15-.60 .15-.60
Incoloy 800HT 39.5 min .06-.10 30.0-35.0 19.0-23.0 .25-.60 .25-.60
Incoloy 825 22.0 min 0.05 max 38.0-46.0 19.5-23.5 1.5-3.0 1.0 max 0.03 max 0.5 max 0.2 max .6-1.2
Alloy 20 Balance .07max 32.00-38.00 19.0-21.0 2.0-3.0 3.0-4.0 2.0max .035max 1.0max .045max
Monel K500 2.0 max .25 max 63.0-70.0 Remainder 1.5 max .01 max .50 max 2.30-3.15 .35-.85

Typical Applications for Nickel Alloy Materials (Oil & Gas)

Nickel Alloy Typical Application Area in Oil & Gas Engineering
Nickel 200/201
  • Marine and offshore engineering
  • Caustic handling equipment
  • Manufacture and handling of sodium hydroxide
  • Reactors and vessels where fluorine reacts with hydrocarbons
Hastelloy C-276
  • Pollution control stack liners, ducts, dampers, scrubbers, stack-gas reheaters, fans, and fan housings
  • Flue gas desulfurization systems
  • Chemical processing components like heat exchangers, reaction vessels, evaporators, and transfer piping
  • Sour gas wells
Monel K500
  • Sour-gas service applications
  • Oil and gas production safety lifts and valves
  • Oil-well tools and instruments like drill collars
  • Oil well industry
  • Chains, cables, springs, valve trim, fasteners for marine service
Monel 400
  • Marine engineering
  • Chemical and hydrocarbon processing equipment
  • Gasoline and freshwater tanks
  • Crude petroleum stills
  • De-aerating heaters
  • Boiler feed water heaters and other heat exchangers
  • Valves, pumps, shafts, fittings, and fasteners
  • Industrial heat exchangers
  • Chlorinated solvents
  • Crude oil distillation towers
Incoloy 800H/HT
  • Ethylene furnace quench boilers
  • Hydrocarbon cracking
  • Valves, fittings and other components exposed to corrosive attack from 1100-1800° F
  • Industrial furnaces
  • Heat-treating equipment
  • Chemical and petrochemical processing
  • Super-heater and re-heaters in power plants
  • Pressure vessels
  • Heat exchangers
Incoloy 825
  • Chemical Processing
  • Pollution-control
  • Oil and gas well piping
  • Nuclear fuel reprocessing
  • Components in Pickling equipment like heating coils, tanks, baskets and chains
  • Acid production
Inconel 600
  • Chemical industry
  • Heat treating industry
  • Nuclear Engineering
  • Gas turbine components
Inconel 601
  • Chemical Processing
  • Aerospace
  • Heat treating industry
  • Power generation
  • Heat treating muffles and retorts
  • Radiant tubes
  • Catalyst support grids in nitric acid production
  • Steam superheater tube supports
Inconel 625
  • Specialized seawater equipment
  • Chemical process equipment
Inconel 718
  • Chemical processing
  • Pollution-control equipment
  • Nuclear reactors
  • Cryogenic storage tanks
  • Valves, fasteners, springs, mandrels, tubing hangers
  • Wellhead completion equipment and blow out preventers (BOPS)

COATED, LINED AND CLAD FITTINGS

In some cases, buttweld fittings can be externally coated with protective materials, internally lined (example PTFE may be inserted to enhance the resistance of the bare metal to corrosive fluids) or clad (the picture shows a clad tee: the tee is made of carbon steel, but the inner side is covered by a higher grade material, stainless steel 316 in this case).

EUROPEAN VS ASTM BUTTWELD FITTINGS 材質

The table shows the equivalent ASTM and European pipe fittings materials grades.

Butt Weld Fittings Materials Comparison Chart
Werkstoff Number European Grade ASTM Grade
CARBON STEEL FITTINGS 材質
1.0254 St 37.0 S235 –
– – – –
1.0305 St 35.8/I P235GH (1.0345) A 234 Grade WPA
1.0305 St 35.8/III P235GH (1.0345) –
1.0405 St 45.8/I P265GH (1.0425) A 234 Grade WPB
1.0405 St 45.8/III P265GH (1.0425) –
ALLOY STEEL FITTINGS 材質
1.5415 15 Mo 3 16Mo3 A 234 Grade WP1
1.7335 13 CrMo 4 4 13CrMo4-5 A 234 Grade WP11, WP12
1.7380 10 CrMo 9 10 10CrMo9-10 A 234 Grade WP22
1.7362 12 CrMo 19 5 X11CrMo5 A 234 Grade WP5
– – – A 234 Grade WP9
1.4903  – X10CrMoVNb9-1 A 234 Grade WP91
LOW-TEMPERATURE CARBON STEEL FITTINGS 材質
1.5637 10 Ni 14 12Ni14 A 420 Grade WPL3
1.0356 TTSt 35 N P215NL (1.0451) –
1.0356 TTSt 35 V – –
– – – A 420 Grade WPL6
HIGH YIELD CARBON STEEL FITTINGS 材質
– – – –
1.0486 StE 285 – A860 Grade WPHY42
1.0562 StE 355 P355N A860 Grade WPHY52
1.8902 StE 420 – A860 Grade WPHY60
1.8905 StE 460 – A860 Grade WPHY70
HIGH YIELD CARBON STEEL FITTINGS 材質
1.0457 StE 240.7 – –
1.0484 StE 290.7 L290NB A860 Grade WPHY42
1.0582 StE 360.7 L360NB A860 Grade WPHY52
1.8972 StE 415.7 L415NB A860 Grade WPHY60
– – – –
STAINLESS STEEL FITTINGS 材質
1.4541 X 6 CrNiTi 18 10 X6CrNiTi18-10 A 403 Grade WP321
1.4571 X 6 CrNiMoTi 17 12 2 X6CrNiMoTi17-12-2 A 403 Grade WP316Ti
1.4301 X 5 CrNi 18 10 X5CrNi18-10 A 403 Grade WP304
1.4306 X 2 CrNi 19 11 X2CrNi19-11 A 403 Grade WP304L
1.4307  – X2CrNi18-9 A 403 Grade WP304L
1.4401 X 5 CrNiMo 17 12 2 X5CrNiMo17-12-2 A 403 Grade WP316
1.4404 X 2 CrNiMo 17 13 2 X2CrNiMo17-12-2 A 403 Grade WP316L
1.4462 X 2 CrNiMoN 22 5 3 X2CrNiMoN22-5-3 UNS S 31803 (Duplex)
1.4529 X 1 NiCrMoCuN 25 20 6 X1NiCrMoCuN25-20-7 UNS N 08926
1.4539 X 1 NiCrMoCuN 25 20 5 X1NiCrMoCu25-20-5 UNS N 08904 (904L)
1.4547  – X1CrNiMoCuN20-18-7 UNS S 31254
, ,
이전::
다음::

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